#include <Rcpp.h>
using namespace Rcpp;

// [[Rcpp::export]]
List scalar_missing(){
  int int_s = NA_INTEGER;
  String chr_s = NA_STRING;
  bool lgl_s = NA_LOGICAL;
  double num_s = NA_REAL;
  return List::create(int_s,chr_s,lgl_s,num_s);
}
